package com.my.oschina.fragment;

import java.util.ArrayList;
import java.util.List;

import android.os.AsyncTask;
import android.os.Bundle;
import android.text.format.DateUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.actionbarsherlock.app.SherlockListFragment;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnLastItemVisibleListener;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import com.my.oschina.R;
import com.my.oschina.adapter.ListViewBlogAdapter;
import com.my.oschina.app.AppContext;
import com.my.oschina.app.AppException;
import com.my.oschina.bean.Blog;
import com.my.oschina.bean.BlogList;
import com.my.oschina.common.UIHelper;

/**
 * 资讯-资讯的子类，包括最新博客、推荐阅读
 * 
 * @author XuShaoJie
 * @version 2013-07-05
 */
public class InfoBlogFragment extends SherlockListFragment {

	private int mInstance = -1;

	private PullToRefreshListView mPullRefreshListView;
	private ListViewBlogAdapter mNewsAdapter;
	private List<Blog> lvNewsDataList = new ArrayList<Blog>();
	private int lvSumData;// 加载的总数目
	private static int BLOG_FLAG = 0;

	private AppContext appContext;// 全局Context

	/**
	 * 返回InfoBlogFragment实例
	 * 
	 * @param type
	 *            加载数据的类型
	 * @return FavoriteFragment实例
	 */
	public static InfoBlogFragment newInstance(String type) {
		InfoBlogFragment ff = new InfoBlogFragment();
		Bundle bundle = new Bundle();
		bundle.putString("type", type);
		ff.setArguments(bundle);
		BLOG_FLAG = 1;

		return ff;
	}

	/**
	 * 返回查看用户信息的时候，加载的博客列表
	 * 
	 * @param hisUid
	 * @param hisName
	 * @return
	 */
	public static InfoBlogFragment newInstance(int hisUid, String hisName) {
		InfoBlogFragment ff = new InfoBlogFragment();
		Bundle bundle = new Bundle();
		bundle.putInt("hisUid", hisUid);
		bundle.putString("hisName", hisName);
		ff.setArguments(bundle);
		BLOG_FLAG = 2;

		return ff;
	}

	private String getArgsType() {
		return getArguments().getString("type");
	}

	private int getArgsUserId() {
		return getArguments().getInt("hisUid");
	}

	private String getArgsUserName() {
		return getArguments().getString("hisName");
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		appContext = (AppContext) getSherlockActivity().getApplication();
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		if (savedInstanceState != null) {
			mInstance = savedInstanceState.getInt("mInstance");
		}
		View view = inflater.inflate(R.layout.activity_ptr_list, container,
				false);
		mPullRefreshListView = (PullToRefreshListView) view
				.findViewById(R.id.pull_refresh_list);
		mPullRefreshListView.setMode(Mode.BOTH);
		return view;
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		super.onActivityCreated(savedInstanceState);

		// Set a listener to be invoked when the list should be refreshed.
		mPullRefreshListView
				.setOnRefreshListener(new OnRefreshListener<ListView>() {
					@Override
					public void onRefresh(
							PullToRefreshBase<ListView> refreshView) {
						String label = DateUtils.formatDateTime(appContext,
								System.currentTimeMillis(),
								DateUtils.FORMAT_SHOW_TIME
										| DateUtils.FORMAT_SHOW_DATE
										| DateUtils.FORMAT_ABBREV_ALL);

						// Update the LastUpdatedLabel
						refreshView.getLoadingLayoutProxy()
								.setLastUpdatedLabel(label);

						if (mPullRefreshListView.getCurrentMode() == Mode.PULL_FROM_START) {
							lvNewsDataList.clear();
							lvSumData = 0;
							mNewsAdapter.notifyDataSetChanged();
						}

						// 加载数据异步处理任务
						new GetFansTask().execute();
					}
				});

		mPullRefreshListView.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				Blog blog = null;
				// 判断是否是TextView
				if (view instanceof TextView) {
					blog = (Blog) view.getTag();
				} else {
					TextView tv = (TextView) view
							.findViewById(R.id.blog_listitem_title);
					blog = (Blog) tv.getTag();
				}
				if (blog == null) {
					return;
				}
				// 跳转到博客详情
				UIHelper.showUrlRedirect(view.getContext(), blog.getUrl());
			}
		});

		mNewsAdapter = new ListViewBlogAdapter(getSherlockActivity(),
				BlogList.CATALOG_LATEST, lvNewsDataList, R.layout.blog_listitem);
		mPullRefreshListView.setAdapter(mNewsAdapter);

		// TODO 第一次启动时候加载数据
		new GetFansTask().execute();

	}

	/**
	 * 加载数据AsyncTask
	 */
	private class GetFansTask extends AsyncTask<String, Void, BlogList> {

		@Override
		protected void onPreExecute() {
			super.onPreExecute();
			getSherlockActivity().setSupportProgressBarIndeterminateVisibility(
					true);
		}

		@Override
		protected BlogList doInBackground(String... params) {
			// 当前pageIndex
			int pageIndex = lvSumData / 20;
			String type = getArgsType();
			if (BLOG_FLAG == 1) {
				try {
					return appContext.getBlogList(type, pageIndex, true);
				} catch (AppException e) {
					e.printStackTrace();
				}

			} else if (BLOG_FLAG == 2) {
				try {
					return appContext.getUserBlogList(getArgsUserId(),
							getArgsUserName(), pageIndex, true);
				} catch (AppException e) {
					e.printStackTrace();
				}
			}
			return null;
		}

		@Override
		protected void onPostExecute(BlogList result) {
			super.onPostExecute(result);
			getSherlockActivity().setSupportProgressBarIndeterminateVisibility(
					false);
			mPullRefreshListView.onRefreshComplete();

			List<Blog> friendList = result.getBloglist();
			// 加载成功且如果有数据
			if (result != null && friendList.size() > 0) {

				// 如果是用户中心的博客，则给博客Tab设置博客数量
				if (BLOG_FLAG == 2) {
					getSherlockActivity()
							.getSupportActionBar()
							.getTabAt(2)
							.setText(
									getString(R.string.blog_with_count,
											result.getBlogsCount()));
				}

				lvSumData += friendList.size();
				lvNewsDataList.addAll(result.getBloglist());
				mNewsAdapter.notifyDataSetChanged();

				if (friendList.size() < 20) {
					mPullRefreshListView.setMode(Mode.PULL_FROM_START);
					// 添加监听器
					mPullRefreshListView
							.setOnLastItemVisibleListener(new OnLastItemVisibleListener() {
								@Override
								public void onLastItemVisible() {
									Toast.makeText(getSherlockActivity(),
											"已加载全部", Toast.LENGTH_SHORT).show();
								}
							});

				} else if (friendList.size() == 20) {
					mPullRefreshListView.setMode(Mode.BOTH);
					// 取消监听
					mPullRefreshListView.setOnLastItemVisibleListener(null);
				}
			}
			// 加载失败或者没有数据
			else {
				Toast.makeText(getSherlockActivity(), "加载失败或者没有博客",
						Toast.LENGTH_SHORT).show();
			}
		}
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);
		outState.putInt("mInstance", mInstance);
	}

}
